/*
 * Copyright 2014 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

package cn.wizzer.mqttwk.mqtt.common.message;

/**
 * Utility class with factory methods to create different types of MQTT messages.
 */
public final class MqttMessageFactory {

    public static MqttMessage newMessage(MqttFixedHeader mqttFixedHeader, Object variableHeader, Object payload) {
        switch (mqttFixedHeader.messageType()) {
            case CONNECT:
                return new MqttConnectMessage(
                        mqttFixedHeader,
                        (MqttConnectVariableHeader) variableHeader,
                        (MqttConnectPayload) payload);

//            case CONNACK:
//                return new MqttConnAckMessage(mqttFixedHeader, (MqttConnAckVariableHeader) variableHeader);
//
//            case SUBSCRIBE:
//                return new MqttSubscribeMessage(
//                        mqttFixedHeader,
//                        (MqttMessageIdVariableHeader) variableHeader,
//                        (MqttSubscribePayload) payload);
//
//            case SUBACK:
//                return new MqttSubAckMessage(
//                        mqttFixedHeader,
//                        (MqttMessageIdVariableHeader) variableHeader,
//                        (MqttSubAckPayload) payload);
//
//            case UNSUBACK:
//                return new MqttUnsubAckMessage(
//                        mqttFixedHeader,
//                        (MqttMessageIdVariableHeader) variableHeader);
//
//            case UNSUBSCRIBE:
//                return new MqttUnsubscribeMessage(
//                        mqttFixedHeader,
//                        (MqttMessageIdVariableHeader) variableHeader,
//                        (MqttUnsubscribePayload) payload);
//
//            case PUBLISH:
//                return new MqttPublishMessage(
//                        mqttFixedHeader,
//                        (MqttPublishVariableHeader) variableHeader,
//                        (ByteBuf) payload);
//
//            case PUBACK:
//                return new MqttPubAckMessage(mqttFixedHeader, (MqttMessageIdVariableHeader) variableHeader);
            case PUBREC:
            case PUBREL:
            case PUBCOMP:
                return new MqttMessage(mqttFixedHeader, variableHeader);

            case PINGREQ:
            case PINGRESP:
            case DISCONNECT:
                return new MqttMessage(mqttFixedHeader);

            default:
                throw new IllegalArgumentException("unknown message type: " + mqttFixedHeader.messageType());
        }
    }

    public static MqttMessage newInvalidMessage(Throwable cause) {
        return new MqttMessage(null, null, null, MqttMessage.DecoderResult.FAILURE);
    }

    private MqttMessageFactory() {
    }
}
